JP2007309520A - Flap door lifting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flap door lifting device capable of lifting a flap door in an opening degree state according to various situations and holding the opening degree state with simple constitution. <P>SOLUTION: The flap door lifting device 5 has a piston 12 arranged in an axially movable manner in a sealed cylinder 6 filled with a pressure fluid, to divide the inside of the sealed cylinder 6 into first and second working chambers 14, 15. A piston rod 7 is mounted to one side of the piston. The piston rod 7 is led outside from the second working chamber 15 while maintaining the sealed state at one end face of the cylinder 6 and hinge-connected to the flap door or a fixed structure part. The other end face of the cylinder 6 is hinge-connected to the fixed structure part or the flap door. The piston 6 is provided with a port 17 leading to the second working chamber 15 from the first working chamber 14, and openable and closable, or either openable or closable. The port 17 can be at least either opened or closed by an electric control valve. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a device for lifting a flip-up type flap door, which is hinged so as to be rotatable around a rotation axis of a vehicle, by means of a piston / cylinder unit. A sealing cylinder filled with a fluid is provided, and a piston that divides the internal space into first and second working chambers is movably disposed in the axial direction inside the sealing cylinder, and a piston rod is attached to one side of the piston. The piston rod is led out from the second working chamber to the outside while maintaining a sealed state at one end surface of the cylinder, and is hinged to the flap door or the fixed structure, and the other end surface of the cylinder Is hinged to the fixed structure portion or the flap door, and the piston is connected to the second work from the first working chamber. Leading to the chamber, opening and closing, or it relates to the flap door lifting device provided with the one or the ports.

  In such a device, there is known a device that manually opens and closes a port by an operating plunger led out from a piston rod.

  However, with this known device, the operator has to come to the flap door area each time to determine the work contents and perform this every time.

  Accordingly, an object of the present invention is to obtain a flap door lifting device that can realize the lifting and holding of the flap door in the opening state according to various situations with a simple configuration as described at the beginning. There is.

  In order to solve this problem, the flap door lifting device of the present invention is characterized in that the port can be opened and closed by an electric control valve.

  According to this configuration of the present invention, it is possible to realize the operation of at least one of opening and closing of the port from the first working chamber to the second working chamber, which is most suitable for various situations. At this time, it is possible to deal with individual situations or to deal with fixed situations.

  At this time, the valve may be a valve that is fully opened by control or that is proportionally opened and closed.

  Preferably, the piston / cylinder unit is a gas spring.

  The electric control valve can be a slide valve or a seat valve.

  In order to configure at low cost, an electric drive is applied only in one of the movement directions, and the closing member of the electric control valve can be configured to move in the opening direction against the spring force.

  Similarly, the closing member of the electric control valve can be configured to move in the closing direction against the spring force.

  With this configuration, the closing member can be easily driven in the direction opposite to the electric driving direction by spring elasticity.

  Preferably, the electric control valve is a solenoid valve.

  Of course, the valve can also be provided with other components for driving the closure member. For example, the position of the closing member can be controlled by a spindle that can be rotationally driven by an electric motor.

  The electromagnetic valve is provided with a ferromagnetic magnetic core arranged so as to be movable in the piston space of the piston, and the magnetic core allows the closing member of the electric control valve to move against the spring force. It can be made more compact.

  More preferably, a coil extending in the axial direction along which the magnetic pole core moves surrounds the region of the magnetic pole core.

  As one example of attaching the coil, there is a method of extending the coil in the cylinder or the wall of the cylinder over the movement stroke of the piston in the cylinder. This embodiment is preferred in that no control lead is required for the fixed coil to move integrally with the piston and piston rod.

  In order not to shield the magnetic field generated from the coil, the coil should be wrapped in a tube made of non-magnetic material or on the outer surface of this tube. At this time, the tube is fitted coaxially in the cylinder, and the piston penetrates the tube. Arrange for movement in the bore.

  Similarly, the coil may be wound around the outer surface of a cylinder made of a non-magnetic material so as not to shield the magnetic field.

  At this time, the tube and / or the cylinder may be made of aluminum, special steel, or synthetic resin.

  As another example of attaching the coil, there is a method in which the coil is arranged in the piston and extends over the moving stroke of the magnetic pole core.

  Preferably, the coil is tightly fixed to the piston. This can be easily achieved by tightly fixing the coil to the piston with a synthetic resin injection gap filling material.

  In order to protect the coil, the coil can also be embedded in the filling gap material.

  In order to avoid the connection from the coil to the second working chamber, the coil may be constituted by a coil block, and the coil block may be sealed with respect to the piston by a sealing element.

  Furthermore, if the sealing element is a seal ring, the configuration is simple. The seal ring is pressed in the radial direction of the coil block, and the outer periphery of the seal ring is disposed on the inner wall of the piston, thereby sealing the piston space that houses the coil block.

  In order to energize the coil, the lead-in control lead can be led out from the coaxial opening in the piston rod to seal the piston rod against the piston space.

  One method for sealing the piston rod against the piston space is to make a pull-in control lead wire in contact with the piston rod at the end region to the piston space with a coaxial opening, and a synthetic resin injection gap seal There is a method of providing.

  As another method for sealing the piston rod with respect to the piston space, a seal body is closely fitted in the piston space between the terminal end of the coaxial opening to the piston space and the coil. There is a method in which a through contact that protrudes on both sides in the axial direction is provided on the body, and a first end of the through contact is connected to a coil, and a second end is drawn in and electrically connected to a control lead.

  At this time, the configuration is simple if the seal body is brought into contact with the piston rod (7) at the end face of the end region to the piston space having the coaxial opening.

  The through-contact can be passed through a through-hole provided in the seal body in the axial direction and sealed against the wall of the through-hole by a seal ring surrounding the through-contact.

  Further, the sealing body can be a glass sealing body, and the through contact can be closed in the glass sealing body.

  In order to seal the piston rod from the piston space, a synthetic resin injection is wholly or partly in the region between the terminal end of the coaxial opening into the piston space and the coil, or in the coaxial opening. It is also possible to fill the gap filling material and insert the lead-in control lead into the filling gap material.

  If the control conductor is a flexible control conductor such as a cable or a flat conductor, assembly is simplified.

  For subsequent routing of the pull-in control lead that is drawn from the piston rod, a termination outlet that directs the coaxial opening at the end protruding into the cylinder of the piston rod, coaxially or radially in the direction in which the piston rod extends. The lead-in control lead can be led out of the piston rod from the terminal outlet.

  Preferably, assembly is simplified if a contact plaque is provided at the end of the lead-in control lead that protrudes from the termination outlet.

  Instead of inserting both lead-in control leads into the piston rod, one lead-in control lead is passed through the piston rod and the other lead-in control lead extends along the inner wall of the cylinder and contacts the coil on the piston. It can also be configured to contact the other lead-in control lead through a sliding contact.

  If one of the lead-in control conductors is formed of a cylinder made of a conductive material, the number of parts is reduced and the configuration is simplified.

  Similarly, if the lead-in control lead is composed of a piston rod made of a conductive material in contact with the coil, the number of parts will be reduced.

  Preferably, the closure member is secured to the pole core.

  In order to achieve a compact configuration, a port in the piston is guided by a valve port that can be guided axially from the first working chamber to the piston space and can be closed by a closing member, and the piston space communicates with the second working chamber. You can also.

  In order to close the valve port securely, the valve port is preferably formed in a short cylindrical part protruding into the piston space, where the end region in the piston space of the valve port (17) is the valve of the seat valve. It shall be configured to make a seat.

  In order to be able to open the flap door manually even when the valve is in a closed state or when the power supply fails, it is preferable that the piston is preferably configured so that a pressing force is applied in the closing direction. By providing the stop valve, the check valve enables the opening from the second working chamber to the first working chamber to be opened.

  The inner wall of the cylinder is provided with one or a plurality of axial grooves spaced apart from each other in the circumferential direction over a partial area of the entire length of the cylinder, and this is used as an axial groove area that acts as a bypass. Within the directional groove region, the gas spring can move freely. This configuration is beneficial when the flap should not stay in a certain opening angle region. Such a constant opening angle is determined at an initial stage when the flap door is opened, and in this initial stage of opening, for example, a user may be present in the area of the flap door.

  For this reason, the axial groove is preferably provided in the end region on the opposite side of the cylinder from the piston rod side, the end region on the piston rod side, or both.

  The valve can be controlled by the control unit based on data stored in the control unit or variable input data.

  Furthermore, in order to generate variable input data in the area near the flap door, a failure recognition sensor (11) for monitoring the area near the flap door can be provided.

  The fault recognition sensor can be a camera, a contact sensor, or a proximity sensor, and when it is a proximity sensor, it can be a laser sensor or a capacitive sensor.

  The variable input data may be meteorological data such as temperature, rainfall, snowfall, or wind speed recognized by the sensor.

  The variable input data may further be vehicle state data such as vehicle body tilt data with respect to the horizon or vehicle travel data.

  The variably data may further be flap door opening data.

  FIG. 1 shows a flap door 3 hinged to the upper end of a rear opening in a vehicle body 2 of an automobile so as to be rotatable about a horizontal rotation axis 4.

  When a key (not shown) is unlocked, the flap door 3 is moved from the closed position to the open position shown by the gas spring 5.

  The gas spring 5 has a cylinder 6 in which a piston (not shown) provided with a piston rod 7 only on one side is slidably guided.

  The free end of the piston rod 7 is hinged to the flap door 3 at a position away from the rotation axis 4 in the radial direction. Further, the end of the cylinder 6 opposite to the piston rod 7 is also hinge-connected at a position away from the rotation axis 4 of the vehicle body 2 in the radial direction.

  From the electrical or electronic control unit 8, the control lead 9 is laid to the free end of the piston rod 7, and the sensor lead 10 is placed on the edge of the flap door 3 opposite to the rotation axis 4 side. The failure recognition sensor 11 provided is laid from the control unit 8.

  In the illustrated gas spring, the piston 12 divides the internal space of the cylinder 6 into a first working chamber 14 and a second working chamber 15, and the piston rod 7 is guided from the second working chamber 15 to the guiding and sealing unit 16. After that, the sealed state is maintained and led out to the outside.

  A piston space 13 is provided in the piston 12, and a valve port 17 extending coaxially with the longitudinal axis of the cylinder 6 conducts from the first working chamber 14 to the piston space 13.

  The piston space 13 communicates with the second working chamber 15 through a lateral hole 27 in the piston 12.

  The valve port 17 is provided in a short cylindrical portion 18 protruding into the piston space 13, and an end surface of the short cylindrical portion 18 on the piston space 13 side is an electrically controllable seat valve 20 configured as an electromagnetic valve. A valve seat 19 is formed, and a plate-like closing member 21 made of an elastic material can be brought into contact with the valve seat 19.

  A ferromagnetic magnetic pole core 22 is coaxially fixed to the closing member 21, and the ferromagnetic magnetic pole core 22 is slidably guided on the longitudinal axis of the cylinder 6 in the piston space 13.

  A spring 23 configured as a compression coil spring and applied with a pressing force is applied to the magnetic pole core 22, and the pressing force is applied in the opening direction of the seat valve in FIGS. It is assumed that pressure is applied.

  In the first embodiment of the gas spring provided in the flap lifting apparatus of the present invention shown in FIG. 2, the entire stroke of the piston movement in the cylinder 6 is covered around the cylinder 6 made of special steel or other non-ferromagnetic material. The coil 24 is surrounded by the coil 24 so that the coil 24 is fixed to the outer surface of the cylinder 6.

  The coil 24 can be energized from the control unit 8 by a control lead 9 not shown in FIG.

  In the second embodiment of the gas spring provided in the flap lifting device according to the present invention shown in FIG. 3, a synthetic resin tube 25 is provided in the cylinder 6. The tube 25 is formed over the entire inner surface length of the cylinder 6, and the cylindrical outer surface and the inner surface of the cylinder 6 are brought into close contact with each other.

  In the through bore 26 of the tube 25, the piston 12 is guided so as to be slidable in the axial direction.

  A coil 24 is embedded in the tube 25, and this coil 24 is provided so as to cover the entire travel of the piston 12, and can be energized from the control unit 8 by a control lead 9 not shown in FIG. 3.

  In the third to ninth embodiments of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIGS. 4 to 12, the coil 24 is provided in the piston space 13, and this coil 24 is provided with clearance around the magnetic pole core 22. Besiege.

  At this time, in the third, fourth, and seventh to ninth embodiments of the gas spring provided in the flap lifting device according to the present invention shown in FIGS. 4 to 6 and 9 to 12, the two shoulder portions 28 and 29 of the piston 12 are used. A coil 24 configured as a coil block in between is held in an axial direction at an assembly position in the piston space 13.

  In the sixth embodiment of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIG. 8, the coil 24 is held in the piston space 13 by the injection gap material 30 made of synthetic resin.

  In the third to eighth embodiments of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIGS. 4 to 11, a coaxial opening 31 penetrating into the piston rod 7 is provided, and the lead-in control lead 32 is passed through the coil 24. The pull-in control lead wire 32 is electrically connected to the control lead wire 9 at the free end of a piston rod (not shown), and the coil 24 can be energized by the control lead wire 9.

  At this time, the coaxial opening 31 seals against the piston space 31.

  In the third and seventh to eighth embodiments of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIGS. 4 and 9 to 11, the periphery of the lead-in control lead wire 32 is injected with a synthetic resin dish-like seal 33. The gap 33 is filled, and the seal 33 is sandwiched between the piston 12 and the end surface of the piston rod 7 on the piston 12 side.

  In the fourth to fifth embodiments of the gas spring provided in the flap lifting apparatus of the present invention shown in FIGS. 5 to 7, the piston space between the terminal end of the coaxial opening 31 to the piston space 13 and the coil 24 region is provided. The sealing bodies 39 and 39 'are provided and sealed. The seal bodies 39 and 39 'are provided with through holes in the axial direction, through which the through contacts 34 projecting on both sides in the axial direction are inserted, and the first end 35 of the through contact 34 is connected to the coil 24 and the second end. Portion 36 is electrically connected to lead-in control lead 32.

  The seal bodies 39, 39 ′ are brought into contact with the end surface of the piston rod 7 on the piston space 13 side through the seal 37 in the axial direction.

  In the fourth embodiment of the gas spring provided in the flap lifting device according to the present invention shown in FIGS. 5 and 6, the through contact 34 is surrounded by a seal ring 38 provided in the seal body 39. The through contact 34 is sealed with respect to the seal body 39.

  In the fifth embodiment of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIG. 7, the seal body 39 'is a glass seal body, and the through contact 34 is cast embedded in the glass seal body.

  In the sixth embodiment of the gas spring provided in the flap lifting apparatus of the present invention shown in FIG. 8, the gap between the terminal end of the coaxial opening 31 and the piston space 13 and the coil 24 region is filled with the injection gap filling material 30. The gap and lead-in control lead 32 is guided into the filling gap material.

  In the eighth embodiment of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIGS. 10 and 11, a check valve 40 which applies a pressing force in the closing direction is provided in the piston 12, and the flap door 3 is manually operated. When the pressure in the second working chamber 15 becomes higher than the pressure in the first working chamber 14, the passage 41 is connected from the second working chamber 15 to the first working chamber 4 through the check valve 40. And can be opened.

  In the ninth embodiment of the gas spring provided in the flap lifting device of the present invention shown in FIGS. 12 to 14, one pull-in control lead 32 is constituted by a piston rod 7 constituted as a conductor, and a cylinder made of a conductive material. 6 constitutes the other lead-in control lead 32. The cylindrical outer surface of the piston 12 is provided with a slide contact 42 projecting in the radial direction and acting as a spring. The slide contact 42 abuts against the inner wall of the cylinder 6 and is electrically connected to the coil 24. Electrical connection from 6 to the coil 24 is made.

  A support disk 43 that electrically insulates the piston 12 is riveted to the end surface of the piston rod 7, and a contact disk 44 is brought into contact with the support disk 43, and the lead wire 45 is coiled from the contact disk 44. Lead to 24.

  At this time, the contact disk 44 can be sandwiched between the piston 12 and the support disk 43 as shown in FIG. 12, or can be riveted to the piston rod 7 together with the support disk 43 as shown in FIGS. At this time, a through groove 46 for the conducting wire 45 is provided on the periphery of the support disk 43.

  During the opening operation of the flap door 3, for example, the presence or absence of a failure in the rotation area of the flap door 3 is recognized by the failure recognition sensor 11, such as the ceiling of the garage being low. A signal corresponding to the transmitted information is transmitted via the control lead 9 and the pull-in control lead 32, and the coil 24 is energized or the coil 24 is de-energized so that the seat valve 20 closes the valve port 17. .

  As a result, the opening operation of the flap door 3 is stopped, and a collision with a failure can be avoided.

  In the eighth embodiment of the gas spring provided in the flap lifting apparatus according to the present invention shown in FIGS. 10 and 11, the stop of the opening operation of the flap door 3 is provided on a part of the inner wall of the cylinder 6. Further, in the region of the axial groove 47 extending in the longitudinal direction of the cylinder 6, this axial groove 47 is always opened as a bypass of the valve port 17, and this is not achieved.

It is a perspective view in the use condition in the automobile rear field of the present invention flap door lifting device. It is a longitudinal cross-sectional view in 1st Example of the gas spring provided in this invention flap door lifting apparatus. It is a longitudinal cross-sectional view in 2nd Example of the gas spring provided in the flap door lifting apparatus of this invention. It is a longitudinal cross-sectional view in 3rd Example of the gas spring provided in the flap door lifting apparatus of this invention. It is a longitudinal cross-sectional view in 4th Example of the gas spring provided in this invention flap lifting apparatus. It is an enlarged view of the site | part X shown in FIG. It is a longitudinal cross-sectional view in 5th Example of the gas spring provided in the flap door lifting apparatus of this invention. It is a longitudinal cross-sectional view in 6th Example of the gas spring provided in the flap door lifting apparatus of this invention. It is a longitudinal cross-sectional view in 7th Example of the gas spring provided in the flap door lifting apparatus of this invention. It is a longitudinal cross-sectional view in 8th Example of the gas spring provided in the flap door lifting apparatus of this invention. It is a longitudinal cross-sectional view in the state where the valve of the gas spring shown in FIG. 10 is open. It is a longitudinal cross-sectional view in 9th Example of the gas spring provided in the flap door lifting apparatus of this invention. FIG. 13 is an enlarged partial cross-sectional view of another embodiment that performs connection with the coil of the gas spring shown in FIG. 12. FIG. 13 is an enlarged partial cross-sectional view of still another embodiment for connecting the coil of the gas spring shown in FIG. FIG. 15 is an end view of the embodiment shown in FIG. 14.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear opening 2 Car body 3 Flap door 4 Rotating axis 5 Gas spring 6 Cylinder 7 Piston rod 8 Control unit 9 Control lead 10 Sensor lead 11 Fault recognition sensor 12 Piston 13 Piston space 14 First working chamber 15 Second working chamber 16 Guide And sealing unit 17 Valve port 18 Short cylindrical portion 19 Valve seat 20 Seat valve 21 Closing member 22 Magnetic pole core 23 Spring 24 Coil 25 Tube 26 Through bore 27 Horizontal hole 28 Shoulder 29 Shoulder 30 Injection gap material 31 Coaxial Opening 32 Pull-in control conductor 33 Seal 34 Through-contact 35 First end 36 Second end 37 Seal 38 Seal ring 39 Seal body 39 'Seal body 40 Check valve 41 Opening 42 Slide contact 43 Support disk 44 Connection disk 45 Conductor 46 Through groove 47 Axial groove

Claims (50)

  In particular, a device for lifting a flip-up type flap door hinged to be rotatable around a rotation axis of a vehicle by a piston / cylinder unit, the piston / cylinder unit being filled with pressurized fluid A sealing cylinder is provided, and inside this sealing cylinder, a piston that divides the internal space into first and second working chambers is disposed so as to be movable in the axial direction, a piston rod is attached to one side of the piston, and the piston rod is The cylinder is further led out from the second working chamber while being sealed at one end face of the cylinder and hinged to the flap door or the fixed structure, and the other end face of the cylinder is fixed A hinge is connected to the structural part or the flap door, and the piston leads from the first working chamber to the second working chamber. , Closure, or in the flap door lifting device provided with the one or the available ports, the port, and wherein the which enables operation of at least one of open and closed by an electric control valve.   The device according to claim 1, wherein the piston / cylinder unit is a gas spring.   The apparatus according to claim 1, wherein the electric control valve is a slide valve.   The device according to claim 1 or 2, wherein the electric control valve is a seat valve (20).   The device according to claim 3 or 4, wherein the closing member (21) of the electric control valve can be driven to move in the opening direction against a spring force.   The device according to claim 3 or 4, wherein the closing member (21) of the electric control valve can be driven to move in the closing direction against a spring force.   The device according to claim 1, wherein the electric control valve is an electromagnetic valve.   The electromagnetic valve is provided with a ferromagnetic magnetic core (22) arranged to be movable in the piston space (13) of the piston (12), and the magnetic core (22) allows the closing member ( The apparatus according to claim 7, wherein 21) is configured to be capable of applying a pressing force that can move against a spring force.   The device of claim 8, wherein the magnetic pole core (22) is surrounded by a coil (24) extending in an axial direction in which the magnetic pole core (22) moves.   10. The device according to claim 9, wherein the coil (24) extends in the cylinder (6) or in the wall of the cylinder (6) over the travel of the piston (12) in the cylinder (6). .   The coil (24) is wound around the tube (25) made of a non-magnetic material or the outer surface of the tube, the tube (25) is fitted coaxially to the cylinder (6), and the piston ( 12. The device according to claim 10, wherein 12) is movably arranged in a through bore (26) of the tube (25).   The device according to claim 10, wherein the coil (24) is wound around the outer surface of a cylinder (6) made of non-magnetic material.   The apparatus according to any one of claims 10 to 12, wherein the tube (25), the cylinder (6), or both are made of aluminum, special steel, or synthetic resin.   The apparatus of claim 9, wherein the coil (24) is disposed within the piston (12) and extends over the travel of the pole core (22).   15. The device according to claim 14, wherein the coil (24) is fixed tightly to the piston (12).   The device according to claim 15, wherein the coil (24) is tightly fixed to the piston by an injection gap filling material (30) made of synthetic resin.   The device according to any one of claims 14 to 16, wherein the coil (24) is embedded in a filling gap material (30).   The device according to claim 15, wherein the coil (24) is constituted by a coil block, and the coil block is sealed with respect to the piston (12) by a sealing element.   The seal element is used as a seal ring, and the seal ring presses in the radial direction of the coil block. The outer periphery of the seal ring is disposed on the inner wall of the piston (12), and the piston space accommodates the coil block. 19. The device according to claim 18, wherein (13) is sealed.   The lead-in control lead (32) is led out to the outside from a coaxial opening (31) in the piston rod (7), and the piston rod (7) is sealed against the piston space (13). The apparatus of any one of -19.   A synthetic resin injection gap seal (33) abutted against the piston rod (7) in the end region of the coaxial opening (31) to the piston space (13) on the lead-in control lead (32). 21. The apparatus according to claim 20, further comprising:   A seal body (39, 39 ') is closely fitted in the piston space (13) between the terminal end of the coaxial opening (31) to the piston space (13) and the coil (24). The seal body (39, 39 ') is provided with a through contact (34) projecting on both sides in the axial direction, the first end (35) of the through contact (34) is used as the coil, and the second end ( 21. The apparatus of claim 20, wherein 36) is electrically connected to said retract control lead (32).   23. The device according to claim 22, wherein the sealing body (39, 39 ') is brought into contact with the piston rod (7) at the end face of the end region of the coaxial opening (31) to the piston space (13).   The through contact (34) is passed through a through hole provided in the axial direction in the seal body (39), and sealed against the wall of the through hole by a seal ring (38) surrounding the through contact (34). 24. A device according to claim 22 or 23, which is stopped.   The device according to claim 22 or 23, wherein the sealing body (39 ') is a glass sealing body, and the through contact (34) is closed in the glass sealing body.   Synthetic resin, in whole or in part, in the region between the terminal end of the coaxial opening (31) to the piston space (13) and the coil (24), or in the coaxial opening (31). 21. The device according to claim 20, wherein the filling gap material (30) made of metal is filled and the lead-in control lead (32) is inserted into the filling gap material.   The apparatus according to any one of claims 20 to 26, wherein the lead-in control lead (32) is a flexible control lead.   28. The apparatus of claim 27, wherein the flexible lead-in control lead (32) is a cable or a flat lead.   The coaxial opening (31) is oriented coaxially or radially in the extending direction of the piston rod (7) at the end of the piston rod (7) protruding into the cylinder (6). 29. The apparatus according to any one of claims 20 to 28, wherein the apparatus has a termination outlet, and the lead-in control lead (32) is led out of the piston rod from the termination outlet.   30. The apparatus of claim 29, wherein a contact plaque is provided at an end of the lead-in control lead that projects from the termination outlet.   One pull-in control lead (32) is inserted into the piston rod (7), and the other pull-in control lead (32) is extended along the inner wall of the cylinder (6) to the piston (12). 20. The structure according to claim 1, wherein the other lead-in control lead wire (32) is brought into contact with the other lead-in control lead wire (32) via a slide contact (42) that comes in contact with the coil (24). apparatus.   32. The device according to claim 31, wherein one of said lead-in control leads (32) comprises a cylinder (6) made of a conductive material.   33. A device according to claim 31 or 32, wherein the lead-in control lead (32) comprises a piston rod (7) made of a conductive material in contact with the coil (24).   The apparatus according to any one of claims 8 to 33, wherein the closing member (21) is fixed to the magnetic pole core (22).   The port in the piston (12) is guided axially from the first working chamber (14) to the piston space (13) by a valve port (17) which can be closed by the closing member (21). 5. The device according to claim 3 or 4, wherein the device is configured such that the piston space (13) communicates with the second working chamber (15).   The valve port (17) is formed in a short cylindrical portion (18) protruding into the piston space (13), and at this time, a terminal region of the valve port (17) in the piston space (13) is a seat. The device according to any one of claims 4 to 35, wherein the device forms a valve seat (19) of the valve (20).   By providing a check valve (40) configured to apply a pressing force in the closing direction in the piston (12), the first operation is performed from the second working chamber (15) by the check valve (40). 37. The device according to claim 1, wherein the opening (41) leading to the chamber (14) is openable.   The inner wall of the cylinder (6) is provided with one or a plurality of axial grooves (47) spaced apart from each other in the circumferential direction over a partial region of the entire length of the cylinder (6). 36. The device according to any one of 36.   39. The apparatus of claim 38, wherein an axial groove is provided in an end region of the cylinder opposite to the piston rod side, an end region on the piston rod side, or both.   The apparatus according to any one of claims 1 to 39, wherein the valve can be controlled by the control unit (8) based on data stored in the control unit (8) or variable input data.   41. The apparatus according to claim 40, further comprising a fault recognition sensor (11) for monitoring a region near the flap door (3) to generate variable input data in a region near the flap door (3).   42. The apparatus according to claim 41, wherein the fault recognition sensor is a camera.   42. The apparatus of claim 41, wherein the fault recognition sensor is a contact sensor.   42. The apparatus of claim 41, wherein the fault recognition sensor is a proximity sensor.   45. The apparatus of claim 44, wherein the proximity sensor is a laser sensor or a capacitive sensor.   41. The apparatus of claim 40, wherein the variable input data is meteorological data recognized by a sensor.   The apparatus according to claim 46, wherein the meteorological data is at least one of temperature, rainfall, snowfall, and wind speed.   41. The apparatus of claim 40, wherein the variable input data is vehicle status data.   49. The apparatus according to claim 48, wherein the vehicle state data is at least one of vehicle body inclination data with respect to a horizontal line and vehicle running data.   41. The apparatus according to claim 40, wherein the variable input data is opening data of the flap door.

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